Alfred j



(ModeL) J. SIGNOR.

DIE STOCK No; 256,448. Patented Apr. 11; 1882.

UNITED STATES PATENT OFFICE.

ALFRED J. SIGNOR, OF ELKHART, INDIANA, ASSIGNOR OF ONE-HALF TO FREDRIOKL. GALLINS, OF SAME PLACE. I

DlE STOCK.

SPECIFICATION forming part of Letters Patent No.-256,448, dated April11, 1882. Application filed June as, 1881. (ModeL) To all whom it mayconcern:

Be it known that I, ALFRED J. SIGNOR, of Elkhart, in the county ofElkhart and State of Indiana, have invented certain new and usefulImprovementsinDie-Stocks for Outtin g Screw- Threads; and I do herebydeclare the following to be a full, clear, and exact description oftheinvention, such as will enable others skilled in the art to which itpertains to make and use it, reference being had to the accompanyingdrawings,whioh form part of this specification.

My invention relates to an improvement in die-stocks for cuttingscrew-threads; and it consists in pivoting one of the handles by whichthe die is operated in one end of the frame in which the dies areplaced, and forming a cam and a stop upon the end of this pivotedhandle, whereby the two parts of the dies can be forced together withany desired degree of pressure, and the pivoted lever be prevented frommoving past the center, as will be more fully described hereinafter.

The object of my invention is to provide a die-stock for cuttingscrew-threads, in which one of the handles by which the die is operatedcan be utilized in forcing the dies together with any desired degree ofpressure, and which handle is made removable from the plate, so that thetool can be packed-int smaller space. t

Figure 1 represents a plan view of my invention. Fig. 2 represents avertical section of the same with the pivoted handle turned at rightangles. Fig. 3 is a perspective of the.

upper part'of the die-stock.

A represents the plate or frame, in which the two parts B G of the dieare placed. Both of these parts of the die have a suitable groove formedin their sides, for the purpose of catching overcorrespondingprojections which are made upon the inner edges of theframe A. The upper part of this die has a portion of one of its sidescut away, as shown, so that it can be readily removed whenever sodesired. These two parts of the die are adjusted back and forth inrelation to each other, and one of them is adjusted by means of thescrew-handle D,

. whichpasses through one end of the frame A,

handle H. This handle,H is pivoted in the open end of the frame upon thebolt I, and for the purpose of preventing this handle from moving beyonda straight line with the frame when the handle is being moved intoposition, it isprovided with a flange, L, which catches against one ofthe parts of the die, and thus acts as a stop. The cam formed on the endof this pivoted handle serves to force the part of the die which is nextto it toward the other part of the die, and to lock the two rigidly inposition. Neither one of these parts of the die can be removed from theframe until the pivoted handle has been turned at right angles to theframe, as shown, so as to raise the cam out of the way. After the handlehas been turned, as shown in Fig. 2, the two parts of the die can bemoved toward this pivoted handle and removed through the cutawayportion, as shown. Should the cam not be sulficient to force the twoparts of the die closely enough together, the other handle can be turnedso as to force them as near together as may be found necessary. By meansof this construction the two parts of the die can be readily removedfrom the frame by simply turning the pivoted handle at right angles, andthen moving the two parts of the die to the cut-away portion, and thusdifferent dies can be used at will. The handle, being pivoted, can alsobe removed, so that the tool can be packed in less space;

I am aware that a frame having a lever or handle pivoted in one end andhaving a cam on its inner end to force the two dies together is not new,andthis I disclaim.

Having .thus described my invention, I claim- In a die-stock, the frameA, open at one end, and having pivoted in this open end a lever, H,which has the cam J and stop L formed upon its inner end, in combinationwith the screw-threaded handle, and dies, substantially as shown.-

In testimony whereof I aflix my signature in presence of two witnesses.

ALFRED J. SIGNOR.

